Production of emulsifiable bituminous substances



Patented Apr. 28, 1936 UNETED STAEES FATENT QFFIQE PRODUCTION OF EMULSIFIABLE BITUMINOUS SUBSTANCES Hans Klein, Mannheim, Germany,

assignor to I. G. Farbenindustrie Aktiengesellschaft,

Frankfort-on-the-Main,

tion of Germany No Drawing.

10 Claims.

invention of having an The very simple nature of its employment and its low cost are further advantagesof brown coal.

Particularly emulsifiable products are obtained by adding the brown coal to the bituminous substances while heating, temperatures of from 100 to 200 C. being the most suitable.

The brown coal employed should preferably be rich in bituminous substances, and poor in humic acid; e. g. mid-German brown coal containing of humic acid.

The resulting mixture is then emulsified in the a vessel provided with lowing a thin jet of water toflow into the mixture. The emulsifying action of brown coal is so marked that in many cases the simultaneous employment of alkaline reacting substances dissolved in the aqueous phase may be dispensed with. Even an addition of very small amounts of brown coal, as for example 0.5 per cent by weight of the emulsion, produces quite a marked efiect, but 3 per cent by weight or even larger amounts should usually be added. With larger additions, the viscosity of the mixture is appreciably increased and this is frequently very desirable, as for example when working up very mobile tars. The

Germany, a corpora- Application January 5, 1931, Serial In Germany January 17, 1930 upper limits of the amounts of brown coal to be added is only determined by the desired final viscosity of the emulsion. Highly viscous products are for example obtained by adding 30 per cent by weight of brown coal to the emulsion, although even more may be employed.

The resulting emulsions may be employed as road constructional materials, for treating surfaces, for protective painting and the like.

:The following examples will further illustrate the nature of this invention, but the invention is not restricted to these examples. The parts and percentages are by weight.

Example 1 300 parts of a mineral coal tar suitable for tarring the surface of roads are heated to 150 C. and 40 parts of ground brown coal containing 2 per cent of water are introduced during the course of half an hour while stirring. Before its employment, the cooled mixture is emulsified with its own weight of water to give a 50 per cent emulsion in a cylindrical vessel provided with an inclined stirring device capable of being rotated at a high speed and having rings provided with holes.

Example 2 A mixture of 240 parts of mineral coal tar and 60 parts of petroleum asphalt is stirred at 160 C. with 50 parts of ground brown coal containing 2 per cent of water. Before its employment, the cooled mixture is emulsified with its own Weight of water in a cylindrical vessel provided with an inclined stirring device capable of being rotated at a high speed and having rings provided with holes.

What I claim is:

1. The process of bringing a substantially water-free bituminous substance selected from a group consisting of tars, tar oils, petroleums and petroleum asphalts into a state in which it can be readily emulsified with Water which consists in incorporating with said substance from 0.5 to 30% by weight of finely divided brown coal poor in humic acid and containing not more than 3% of water.

2. The process of bringing a substantially water-free bituminous substance selected from a group consisting of tars, tar oils, petroleums and petroleum asphalts into a state in which it can be readily emulsified with water which consists in incorporating with said substance from 0.5 to 30% by weight of finely divided brown coal poor in humic acid while heating to a temperature of from of water and then mixing 100 to 200 C. until the content of water in the mixture is not more than 3%.

3. The process of preparing'a water emulsion ofasubstantially water-free bituminous substance selected from a group consisting of tar's,tar oils, petroleums and petroleum asphalts which consists in mixing said substance with 30% by weight in humic acid and containing not the composition thus obtained with water.

' of substantially water-tree mineral coal tar which consists in mixing with ground brown coal poor in humic acid while heating to a temperatureof about 150 C. until the mixture contains not'more than 3% of water and then incorporating with the resulting mix-' 'ture about its'own weight of water. I

5. The process of preparing a water emulsion .of a composition consisting of about 80% oi substantially" water-free mineral coal tar and about 20% of substantially water-free petroleum asphalt which consists in mixingwith said composition about of its weight of finely di-' vided brown coal poor in humic acid while heating'ata temperature of about 160 Ci until the than 3% of water and then incorporating with the resulting mixture its own weight of water. f

'6. A composition s "table for; emulsification withwater consisting of a substantially waterfree bituminous substance selected from a group consisting of tars, tar oils, petroleums and petroleum asphalts and from 0.5 to about by weight of finely divided brown coalpoor in humic acid and containing not more than 3% of water. I r

L'The process of preparing awater emulsion of a substantially water-free bituminous subfrom 0.5 toof finely divided brown coal poor more than 3%" said'ta'r aboutl3'% of stance selected from the group consisting of tars, tar oils, petroleums and petroleum asphalts which consistsin mixing said substance with from 3 to 30 per cent by weight of finely'divided brown coal rich in bituminous substances and poor in hurnic acid and containing not more than 3 per 8; The process of preparing a water emulsion of a bituminous substance which comprises mixe cent of water,

cent of water and then mixing the compoj sition thus obtained with water.

I ing with water a mixture of a substantially wa- I 4. The process of preparing ,a water emulsion I '9, The process of preparing a water emulsion of a bituminous substance which comprises mixing' with water a composition obtained by heating a mixture of a substantially water-free bituminous substance selected from the group consisting of tars, tar oils, petroleums, and petroleum asphalts with from 3 to 30'per cent by weight of finely.

, divided brown coal poorin humic acid until'the content of water in themixture is not more than 3 per cent.

'10. The process of preparing-a'water emulsion of. a bituminous substance which comprises mix- 7 ing with water a composition obtained by heating a mixture of a substantially water-free leiturninous substance selected from the group con-'- sisting of tars, tar oils, petroleums and petroleum asphalts with from 3 to 30 percent 'byweight of I finely divided brown coal rich inbituminous sub- 7 stances and poor in humic acid until the content of Water in the mixture is not more than 3 per cent. I

HANS KLEIN. 

